Collecting Terrorist Information through Torture

The Senate Intelligence Committee released a report today stating that torture and enhanced interrogation techniques, such as waterboarding, as used by the Central Intelligence Agency (CIA), were not effective in revealing significant intelligence information for US defense purposes. The CIA strongly disputes that conclusion.
We don't know whether the Senate Intelligence Committee or the CIA is right or wrong or whether they are both partially right. Presumably, the objective of the Senate report is to force the CIA to discontinue using torture and waterboarding, if such is still being used.
If a captured terrorist knows the location of a dirty atomic bomb set to go off in two days and kill or maim thousands of people, I want the CIA to use every means at its disposal to determine the location of that bomb, in order to neutralize it. This includes use of torture, waterboarding and anything else anybody can think of, including pulling out fingernails. However, if the CIA wants the location of where a couple of terrorists meet for coffee and discussions, I'm not much for the torture idea. In other words, the seriousness of the situation will dictate the judgment of what kind of interrogation technique will be used. I can't make that judgment, because there's so much flexibility involved. We have to trust the CIA in most aspects of its operations. I believe we're pretty much convinced that the CIA is trying to protect the American public, and I don't believe we are justified in trying to micromanage it, from a point where we have little or no information.
The big issue seems to be the matter of pain, as judged by abuses of compassion. There are some nuts who believe that minimizing pain in an individual is justification for jeopardizing the lives of millions of people. I'm not one of them. Situations must be handled as they occur. That's why we have the CIA. However, even compassion abusers have some rights and their opinions should be considered.
The idea of torture is based upon an exchange principle. If the tortured person will relieve information, the torturer will relieve applied pain. While it has worked from time immemorial, new technology has entered the scene since the beginning of World War II. The Nazis were developing at that time mind control drugs which in effect when used on an individual allowed that individual to happily and painlessly reveal information. I suspect the CIA is presently using that approach, but perhaps it should be encouraged to engage in additional research and development in that area, which will eventually eliminate torture as obsolete, and simultaneously relieve the pain of compassion abusers.